I've been testing out a supposedly working Battlezone board for another forum member here, and it seems to be running, but with a few issues and I wonder if anyone can give me some pointers as to what might be up.

PCB is getting a solid +5, all chips have been reseated, and inter connecting loom unplugged and reconnected. I've replicated the same issues using another monitor, confirmed working in an Asteroids. So I'm guessing this is a PCB issue.

Firstly, the vectors seem extended and distorted. The extent of this seemed to vary minute by minute, but to give you an idea:

In addition, there were random vectors flickering on screen during gameplay.

That was yesterday.

Today I've switched on, and the distorted vectors don't seem to be there any more (the words and numbers seem aligned OK now, but I'm still getting these flickering random vectors. Here's a vid of what's going on:

If you watch closely you can see them appear every now and then.

Also, in attract mode, I can very faintly hear the radar "blip" when it appears on screen showing the game. (This might be normal for these boards?).

I was thinking about the interconnect cable, as this always causes problems on my Tempest. Maybe a reflow of the header pins might be in order (although it looks as though this has been done at some point).

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